Russia's geopolitical conflicts, anemic oil prices and weakened ruble are working out rather well for the country's biggest publicly traded farming company.

Ros Agro PLC has ambitious plans to build pig farms and greenhouses in central and eastern Russia, as well as for acquisitions, by selling U.K.-listed shares.

Its aim for the first Russian offering of new stock in London since October illustrates a wider renaissance for the nation's farms as billionaires from Vladimir Evtushenkov to Gennady Timchenko, friends of President Vladimir Putin, invest in tomatoes and apple trees. It also marks the curious consequences of Russia's worst falling out with the U.S. since the Cold War.